Manley Valve - Intake, Valve-S/D BRODIX SR20? 2.400, 6.030 12344-1

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Specifications:

BrandManley
Part Number12344-1
GTIN00807298084060
Cylinder HeadBb-4/sar, Sr20
EngineBig Block
Engine TypeIce
Engine Valve Quantity1
Head Diameter2.400 in
MakeChevrolet
Margin Width0.055 in
O/a Length6.03 in
Product TypeEngine Intake Valve
Seat Width0.060 in
Stem Diameter0.3415 in
Tip Length0.250 in
Top Of Head5 Degree Dish
Underhead Angle10.00 degrees
Underhead Radius3/8
Valve Head Diameter2.400 in
Valve Head Shape5 Degree Dish
Valve Length6.030 in
Valve MaterialStainless Steel
Valve Quantity1
Valve SeriesSevere Duty? Series
Valve Stem Diameter0.3415 in
Valve Tip Length0.250 in
Valve TypeIntake

Specifications:

Description:

Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400°F, Manley exhaust valves endured 100 million cycles, while competitors failed after just 100,000, proving a 1,000× longer fatigue life. Each valve features chrome stems, hard tips, and swirl-polished underheads with fully machined combustion faces for superior airflow, efficiency, and wear resistance. Built for those who demand race-winning strength and precision, Manley Severe Duty® Valves set the industry standard for performance and endurance.

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